Axial closed-loop flux motor or generator

Abstract

An axial closed-loop flux electric motor or generator is a brushless AC and DC permanent magnet motor or generator, comprising a rotor having a rotor disc, permanent magnets, a shaft, and bearings; a stator having a casing and armature(s) which comprises a C-shaped core and a coil; and an electric control system. The even-numbered permanent magnets are evenly fixed or embedded in the holes of the edge of the rotor disc. Each magnet pole NS line in the hole is parallel to the shaft axis . The magnetic poles of adjacent permanent magnets are opposite. The armatures straddle the edge of the rotor disk without touching it. A single-unit motor or a single-phase AC generator comprises a stator, a rotor and an electronic control system. Coupling two or three single-unit motors can form a dual-unit motor, a triple-unit motor or a three-phase AC generator.

1 . An axial closed-loop flux electric motor or generator including: 
 (1) a single-unit motor comprising:
 (a) a rotor having a shaft, a flat cylindrical disk fixedly attached to the shaft, permanent magnets, and bearings mounted to the shaft; 
 (b) a stator having at least one armature which consists of a C-shaped core and a coil wound on the C-shaped core, a motor casing and other structural parts that fix these parts; 
 (c) and an electronic control system having MCU, power supply, power controller to control the current direction of the coils, a rotor position sensor or a shaft angle sensor which can be Hall effect elements, optical sensor, photoelectric sensor or any device which can sense the rotor disk position or the rotation angle of the rotor shaft; 
   (2) a dual-unit motor which consists of two single-unit motors, combined in one casing and the two rotor discs fixedly attached to one rotor shaft at different rotation angles;   (3) a triple-unit motor which consists of three single-unit motors, combined in one casing and the three rotor discs fixedly attached to one rotor shaft at different rotation angles; and multi-unit motors which consist of more than three single-unit motors, combined in one casing and all rotor discs fixedly attached to one rotor shaft at different rotation angles.   
     
     
         2 . The axial closed-loop flux electric motor or generator of  claim 1  , wherein said disk is a flat cylindrical disk made of non-magnetic material, on which having even-numbered through holes at equal distances from the centre of said disc, and at equal central angle of said disk. 
     
     
         3 . The axial closed-loop flux electric motor or generator of  claim 2 , wherein the permanent magnets are fixed or embedded in said holes. 
     
     
         4 . The axial closed-loop flux electric motor or generator of  claim 3  , wherein the pole NS lines of said permanent magnets in said holes are all parallel to said shaft axis, and the poles of adjacent said permanent magnets are opposite. 
     
     
         5 . The axial closed-loop flux electric motor or generator of  claim 1  , wherein said armature(s) straddles the edge of said rotor disc without touching it, and maintain a narrow air gap between said C-shaped core(s) and the surface of poles of said permanent magnets of said rotor. 
     
     
         6 . The axial closed-loop flux electric motor or generator of  claim 5 , wherein said permanent magnets on said rotor can freely pass through the grooves of all said C-shaped cores on said stator. 
     
     
         7 . The axial closed-loop flux electric motor or generator of  claim 1  , wherein said armature coils on said stator are connected in parallel, and adjacent armature coils wound in opposite directions, called left-handed coil and right-handed coil. 
     
     
         8 . The axial closed-loop flux electric motor or generator of  claim 1 , wherein said single-unit motor also is a single-phase AC generator, and said triple-unit motor also is a three-phase AC generator. 
     
     
         9 . An axial closed-loop flux electric motor or generator can be retrofitted into a shaftless motor or shaftless generator, by increasing the diameter of said rotor disk(s) and a hollow shaft. 
     
     
         10 . The axial closed-loop flux electric motor or generator of  claim 9 , wherein said rotor disk(s) and two bearings are fixedly attached to said hollow shaft. 
     
     
         11 . The axial closed-loop flux electric motor or generator of  claim 9 , wherein said rotor disk also can be fixedly attached to the inner ring of a bearing which is mounted on said stator and within the grooves of all said C-shaped cores.